Automatic feed-stop device for drilling-machines.



A. W. WIGGLESWORTH. AUTOMATIC FEED STOP DEVICE FOR DRILLING MACHINES.

APPLICATION FILED MAY 31, 1907.

Patented June 8, 1909.

, B SHEETS-SHEET 1.

A. W. WIGGLESWORTH.

AUTOMATIC FEED STOP nmncx: FOB DRILLING mcamns.

A PPLIOATIOH FILED MAY 31, 1907.

Patentari June 8, 1909.

8 SHEETS-8HEBT 2.

y i illlllll A. W. WIGGLESWORTH. 7 AUTOMATIC FEED STOP DEVIGE FOR DRILLING MACHINES.

APPLIOATION FILED MAY 31, 1907.

Patented June a, 1909.

3 SHEETS-SHEET 3.

- ALBERT W. WIGGLESWORTH, OFGHIOAGO, ILLINOIS.

AUTOMATIC FEED-STD? DEVICE FOR DRILLING-MACHII-IES.

i1 all whom itzmwy concern: .Bedtknown that I, ALBERT. W WIGGLES; .won'rn, a citizenofi the United States, and a Specification of Letters Patent. 'Applicationfiled ma 31,:1907.

=-nresident of Chicagmin the county of Cook.

- ;a1-1d.-State of Illinois, have invented certain new and useful Improvements. in Automatic Feed Stop Devices; for iDrillingdl'laehines; andiIi doihereby declare that the following is la. full,. clear, and. exact. description .thereof lfia'eferencegbemg had to the accompanying dra.w-ings, and :to. therfigures of reference imarked thereon, .WhlChzfOI'm a. part otthis;

specification. I. This invention relatesv to, improvements in dril-ling machines and-refers more .specifically to a novel automatic mechanism for 'arresting the. feed of they head orframe carrying the drill spindle onspindles, whereby the. tool on tool oper ted by the machine may be 2.0. automatically arrested after being fed a predetermined distance. into the work, thus securing uniform action of the drills on the work.

' -The inventiorr consists. in the matters here-i iinafter set .forthi,iand,..more particularly pointed out in the: appendedclmms.

. In thedrawingszk Figu'r-el isa side elevation :of a multiple .drilling.machine:emloody ing my. invention: Fig..2 is. a horizontal 0 section taken through the columnand thedrill carrying .frame, showing-a part of the feed mechanism. Fig. 3is an enlargeddetail of the automaticstop devices for the feed mechanism.z is a hori'zontalsectiou,

3 taken on line 41-4 of Fig. 3. Fig. 5 is a side elevation-0f the; parts shown in Fig. 3, asviewed from the left-hand side of, Fig. 3. Fig. 6- is a vertical section taken through the variable speed device of the feeding mechan- 0 ism. Fig. is a cross-section, taken on line 7-7 of Fig. 6. F igf 8 is a detail illustrating one'of the gears of the feed mechanism and a tripping lug thereon for tripping the feeding mechanism out of action. '45. As shown in the drawings, 10 designates the base of the machine. 11 avertical column --supp0rted thereon, and .12 designates, as a whole, a frame or headwhich carries aplurality of drill spindlesl3, as, herein shown, the gearing (not, shown) for driving said spindles from a common .source of power and the flexible shafts 14 for connecting said gearing with thespindlcs. The construction Patented June 8, 1909.

Serial No. 376,687.

of said head and the manner of mounting the spindles and their operating-gear mechanism therein constitute no part 011 my present invention and are not shown in deta1l... Sa1d head has vertical sliding engagement with the column, in the manner shown in Fig. .2, said column being provided with oppositelydirected, vertical flanges l5 engaged by the head, and the head is provided withidetachably. secured vertical plates or guides 16-, .thereby-counecting the head to the column imamanner to permit "vertical movementI but holding it laterally in place on the column.

17 (Fig. 9.).designates a horizontal feed shaft that is rotativelymounted in the. head and carries a pinion 18..tha-t .meshes with a .vertical rack 19 on the. column, whereby rotation of the feed shaft moves the head vertically with respect to the column to advance the drill carrying head to or retractit from theyworlc. The said head .isroounterbalanced in the usual. manner byuneans of the counterhalancing. chain 20 attached at its lowerendtothe. head and which is trained over a pulley :21 .and.extends down into the hollow column for attachment to a suitable counter-Weight (not herein shown). Power is-..transinitted to. the drill. spindlegears through the medium of a. shaft 22that is connected at its upper end in any suitable manner with a source supplyingopower lhrtagh. the medium of the usualrlmnge speed device, not shown in detail.

Myprescnt invention relates to a novel .mechanism. which cooperates with the feed niechamsm in a manner to automatically arrest thefecd movement of the drill. spindle carrying head or frame at a iiredetermined time in its advance movement. relatively to the work being done.

I will now describe an approved arrange mont or embodiment of my invention and the manuerof operating the same. It is to be understood, however,.that the essential features of the invention may be embodied in constructions diifering widely indetails from that herein shown.

.The rotativc feedshai'tt 17 carries at its forward end a gear wheel 25 which meshes with a pinion 26 (shown in dotted lines in Fig. 3) rotatively. mounted on-a stud 27 extending forwardly from. the head,.(Figs. 2

' spindles.

15 mounted a plurality of varied diameter.

and 3}. 2S designates a worm wheel which 15 also rotatively mounted on said stud 2i and is fixed to, in any suitable manner, and

tative shaft 30 which is mounted in a vertical Said sleeve or bearing sleeve or bearing 31. 31 is swingingly or rotatively connected with the frame in such manner that the worm 29 may be swung out of mesh with the worm wheel 28, and thereby disconnect or throw out of gear the feed device. As herein shown the sleeve is provided at its upper and lower ends with arms 32, 32avhich are re tatively mounted to swing on a vertical shaft or stud 33 that extends downwardly through and is fixed in brackets 31, 3f extending forwardly from the spindle carrying frame. The said vertical feed shaft 30 is connected at its upper end with power by which the feeding operationis effected through a suitable variable or change speed mechanism of which the shaft 30 constitutes the secondary shaft, and is made as follows: 36 designates a gear wheel which is fixed to the upper end of the shaft and meshes with a pinion 37 which is adapted to freely rotate on the stationary stud or shaft Said pinion ST constitutes one member of a cone gear, the other gradually increasing diameter members being 38 and 39. i0 (Fig. (3) designates the primary shaft of the variable speed gear referred to which is rotiatively mounted in an extension d1 of the upper bracket 34- carrying the intermediate shaft or stud 3?. Said primary shaft extends above and below its bearing bracket and is provided at its upper end with a belt pulley 42 that is driven through the medium of a belt d3 from a belt pulley ll on the shaft 22 that transmits power to the gear mechanism of the drill ()n the lower end of the shaft l0 gear wheels 46, H, -18, which mesh, respertively, with the gears 39, 3S, 3? on the intermediate shaft Said gear wheels 46, ii, 48 are normally loose on the shaf 2 st), aml means are provided for severally locking them to said shaft, constructed to lock one gear to the shaft at a time thus providing three different speeds under whichthe secondary shaft may be driven through the gears 3t), 38 and 37. The means herein shown for thus locking the gear wheels to the primary shaft/is made as follows: The said primary shaft is tubular and contains a sliding pin 50 which is'provided near its lower end with a recess 51. in 'which is pivotally mounted a key 52 that is adapted to project at its free end outwardly througl'i a slot 53 at one side of the hollow primary shaft for engagement with recesses or notches 54 formed in the bores of the gear wheels l6, l7 and lb, as more clearly shown in Figs. (3 and T. The said key .is normally pressed outwardly through said slotv for engagement with said notches of the gear wheels through the medium of a spring Fifi interposed between the free end of the key and the bottom of the recess 5. The notches of said gear wheels are separated by collars 5t interposed between the wheels and con tained, as herein shown, in annular recesses on the adjacent ends of the wheels. its the pin 50 is shifted endwise, the engaging end of the key slides under said partition collars and is held in its retracted position, against the action of the spring 53, umil it is brought. into full register with one of the notches in the next adjacent gear wheel, whereupon the spring forces the key into engagen'ient with said notch to lock the gear to the primary shaft. The slot 53 in the hollow primary shaft is made of such length that re adjusting pin 50 may be moved a distance to shift the key entirely away from the gear wheels, thus disconnecting the primary shaft from the secondary shaft of the variable speed gear.

As before stated, the sleeve 31, carrying the secondary shaft of the variable speed gear on which is mounted the worm pinion 29, is adapted to swing about the axis of the stud 33 which, in this instance, constitutes the intermediate shaft of the variable speed gear. This particular arrangement best shown in Fig. 1-. Means are provided for normally locking said shaft in position to hold the worm 29 engaged with the wormwheel, which comprises, in the present. instance a horizontal, vertical swinging latch lever U0 that is hinged at its rear end to a bracket (ll extending forwardly from the drill :arrying head or frame, by means of a pivot 62.

G3 designates an arm which extends laterally from and is rigid with the bearing sleeve 31 of theshaft 30, and said arm extends beneath the latch lever 60. The latch lever 60 is provided with an outwardly or forwardly facing shoulder (ll (Fig. which is adapted to fall behind the arm 63 and to lock said arm in a position to hold the worm "39 against the worm-wheel. G5 designates a fiat spring attached at one end to the front face of said arm (33 and adapted to hear at its free end against a pin (36 extending downwardly from the latch lever 60 beyond or forwardly from the arm 65. It will thus be noted that when the outer end of the latch lever 60 is swung or raised to release the shoulder 64 from the arm (35, said spring (35, which is normally under tension, acts to force the arm tl3'rearwardly and thereby swing the sleeve 31 and the shaft 30 carried thereby to the position shown in dotted lines in Fig. 4 with the result of releasing the worm from the worm' wheel 28. Such release of the latch lever may be effected by hand, and the latch lever is provided with a hand-grip (38 for manual operation of said'lever. In accordance with one feature as follows: Said latch lever is provided with a depending trip arm 70 which extends townwardly therefrom in front of the feed gear wheel. and is adapted for contact;

at its lower end with a tripping block 7.1 carried on the outer face of said feed wheel 9."). Said-tripping block is mounted on said wheel 25 by means permitting adjustment of the block angularly of the axis of the wheel. A convenient means for thus connecting the block with'the wheel is shown in detail'in Fig. 5 and consists in providing the. wheel with a T-shaped annular groove 73 which receives a bolt, 74: that extends outwardly through said groove and tli rough a registering opening in the block It; A nut 75 screw threaded to the bolt clamps the block in place: The rear part of said T-' shapcdgroove is cut away at one point, as indicated at 76 in Fig. 8, to permit the bolt to he inserted t-hereintoand removed therefrom. Said tripping block 71 is formed with an inclined contact face that faces the direction toward which the wheel rotates, and the tripping armis formed with a ronndedsurt'aceor end to facilitate the engagement of the trapping arm with said block, 'liest shown in Fig. 5. The said tripping arinis normally held pressed with its. free end toward the feed wheel 25, to maintain the saine-in.the'p; th of the tripping lug,through the medium of a spring 80 that is attached at oneend to the under face of'the arm 53 and engages at its outer or free end a pin 81.

extending; horizontally and forwardly from the tripping arm. The said secondary shaft of the 'ariable speed gear carrying the worm 29 is swnn into its operative/or worring position after having been tripped through the mechanism described, through the medium of an arm 82 carried'by and extending laterally from the bearing sleeve 31 of said shaft. The worm-wheel 28 is provided with a plurality of radial arms or handles 83 by which the said wheel may be rotated andthe spindle carrying head advanced to and retracted more quickly from its work than may be effected through the a ntomatic feeding mechanism described.

,I claim as iny inventions--- 1. An automatic feed stop for drilling machines ciinnprising, in combination, a feed shaft, a wheel fixed thereto, a cam device attached to and-singularly adinstahle on said wheel, mechanism for rotating the feed wheel and its shaft embracing a worm wheel geared to said feed wheel. and a shaft )rovided with a worm ineshii'ng' with said worm wheel, a swinging bearing for said latter shaft which swings on an axis parallel with said shaft. whereby said worm may be swung toward and from the worm wheel, means for loclo in the worm worm in mesh with the worm wheel, and means operated by said cam device for re leasing the worm from said worm wheel.

'2. ..\n automatic feed stop for drilling machines comprising, in combination, a feed shaft, a gear wheel fixed thereto, a cam device attached to and angularly adjustable on said wheel, means forrotating said feed wheel and its shaft conn irising a rotative shaft provided with a worm, a. worm wheel meshing with said worm, and a pinion rotating with said. worm wheel and meshing With said feed wheel, a swinging bearing for said worm shaft arranged to permit the worm to be swung toward and from said worm wheel. a swinging latch pivoted to a part stationary relatively to said bearing and adapted to engage a part rigid with the bearing to lock the worm in mesh with the wornr wheel, and an arm rigid with said latch adapted for engagement by said rotative cam device.

3. An automatic feed stop for drilling machines comprising, in combination, a horizontal feed shaft, a wheel fixed thereto, a cam device attached to and angularly adjustable on said wheel, mechanism for rotating the feed wheel and its shaft embracing a worm wheel geared to said feed wheel, a vertieal'shaft provided with a. Worm meshing with said worm wheel, a horizontally swinging hearing in which said latter shaft is mounted, whereby said worm may be swung toward and away from the worm wheel, an arm rigid with said bearii'ig, a vertically swinging latch adapted to engage said arm to lock said worm in mesh with the worm wheel, a. downwardly extending trip,

arm carried by said latch adapted for engagement with said cam device, andaspring device between said latch and arm for swing inn said bearingj and Worm shaft horizontally away from the worm wheel when the latch is released from said arm.

4. An automatic feed stop for drilling machines comprising, in combination, a horizontzal feed shaft. a wheel fixed thereto, a (tllll device attached to and angularly adjustable on said wheel, mechanism for rotating the feed wheel and its shaft embracing a worm wheel geared to said feed wheel, a vertical shaft provided with aworm meshing with said worm wheel. a horizontally swing ing bearing in which said latter shaft is mounted, whereby said worm. may be swung shaft in position to hold said toward and awav from thew0r1n wheel an 'arm rigid with said hearing, a vertically sn'inginglatch arranged over said arm and provided with-a forwardly facing shoulder adapted to engage said arm to lock said der of saidflatch free from said arm, and a spring on the arm adapted for engagement with a part on the latch for swinging the arm rearwardly when said shonldrr is so disengaged from said arm.

In testimony, that I claim the foregoing as my invention 1 afiix my signature in the presence of two witnesses, this 22 day of May, A. D. 1907.

ALBERT \V. XVIGGLESW ORTH.

W itnesses GEORGE R. VVILKINS, T. H. ALFREDS. 

